[3.13] gh-146245: Fix reference and buffer leaks via audit hook in socket module (GH-146248) (GH-146275)

(cherry picked from commit c30fae4)

Co-authored-by: AN Long <aisk@users.noreply.github.com>

Author: miss-islington

Misc/NEWS.d/next/Core_and_Builtins/2026-03-21-08-48-25.gh-issue-146245.cqM3_4.rst

@@ -0,0 +1 @@
+Fixed reference leaks in :mod:`socket` when audit hooks raise exceptions in :func:`socket.getaddrinfo` and :meth:`!socket.sendto`.

Modules/socketmodule.c

@@ -4582,6 +4582,7 @@ sock_sendto(PySocketSockObject *s, PyObject *args)
     }
 
     if (PySys_Audit("socket.sendto", "OO", s, addro) < 0) {
+        PyBuffer_Release(&pbuf);
         return NULL;
     }
 
@@ -6801,7 +6802,7 @@ socket_getaddrinfo(PyObject *self, PyObject *args, PyObject* kwargs)
 
     if (PySys_Audit("socket.getaddrinfo", "OOiii",
                     hobj, pobj, family, socktype, protocol) < 0) {
-        return NULL;
+        goto err;
     }
 
     memset(&hints, 0, sizeof(hints));